Merge pull request #2708 from murgatroid99/grpc-js_trailers_only_fix2

grpc-js: Fix check for whether to send a trailers-only response

Author: murgatroid99

packages/grpc-js/package.json

@@ -1,6 +1,6 @@
 {
   "name": "@grpc/grpc-js",
-  "version": "1.10.5",
+  "version": "1.10.6",
   "description": "gRPC Library for Node - pure JS implementation",
   "homepage": "https://grpc.io/",
   "repository": "https://github.com/grpc/grpc-node/tree/master/packages/grpc-js",

packages/grpc-js/src/server-interceptors.ts

@@ -866,7 +866,7 @@ export class BaseServerInterceptingCall
         status.details
     );
 
-    if (this.stream.headersSent) {
+    if (this.metadataSent) {
       if (!this.wantTrailers) {
         this.wantTrailers = true;
         this.stream.once('wantTrailers', () => {